I'm an engineer and I wanted to make a toy for my 3 year old daughter for Christmas. She loves Little Einsteins but since that was 12 years ago, they don't really make many of the toys anymore. Any that are still available are held by collectors and sell at a premium ($100+ for a smaller one).

I wanted to make her Leo's baton as that is her favorite character. I have a 3D printer and making something like that won't be an issue. My idea is making something that resembles it physically but not identically and has a few buttons that will play a couple of soundbites from the show when pressed (the baton on the show does not do that). It won't have any logos, iconography, or anything tying it to the show on the outside.

If it's a legal issue, I can just change the soundbites to something generic but it would mean more to her for it to be a Little Einsteins thing. Will the physical likeness itself be a possible enfringement?

This isn't something I would be selling or making money off of and since they aren't produced, the toy isn't easy to come by.

NB: if I'm not stepping on any toes and make it as described for my daughter, could I document the build and put it online (a blog or social media)? Could I share the 3D model* on a website under the Creative Commons License (no money or anything is gained)?

I'm sorry if this seems like a dumb question, I'm not familiar with copyright law and I don't want to get myself in any trouble.

*Models are required for 3D printing

  • 1
    Basics of copyright: you're copying or outright using something that you don't have the permission for. Similarity is almost irrelevant. It's called copyright because it's about the rights to copy.
    – user4657
    Commented Dec 18, 2016 at 0:49
  • @Nij As a curiosity, at what point can I make a stance and say that my red and blue wand that has buttons and plays music isn't an imitation or copy from the show? The baton in the show doesn't have buttons nor does it play music; the only tie-in would be the soundbites. As long as I don't use any digital media from the show, it should be OK, right? I don't meant to split hairs, I'm just being curious.
    – Rincewind
    Commented Dec 18, 2016 at 3:00
  • When you make a red-and-blue wand for the sake of a red-and-blue wand, without using materials from the protected source, is when you can make a stance that it's not a copy. You wouldn't be able to take a stance that it's not an imitation though, since you admit this is the entire point, but that may or may not matter - you'll have to find out if/when you get sued.
    – user4657
    Commented Dec 18, 2016 at 4:02

2 Answers 2


There are two aspects in which similarity enters the infringement analysis:

  1. As evidence of copying, and
  2. When determining whether what was copied was enough to be infringement

Let's take it for granted that you've based your item off of Leo's baton. So, your question is about similarity at the second stage, after copying has been established.

All US courts use "substantial similarity" as the test for this stage. (This can be confusing, because some courts use the same phrase for the amount of similarity required in the first stage, to establish that copying happened).

Substantial similarity can arise even when taking only a small percentage of the original, especially if you've taken the "heart" of the work. (Harper & Row v. Nation Enterprises 471 U.S. 539 (1985) - where 300-400 words of a 7500 word manuscript were taken).

Various circuits have developed their own specific tests that juries should use to assess substantial similarity. In the 9th Circuit, two cases that highlight their approach to similarity between works of art are:

Krofft established a two-part test that separates idea and expression, such that copyright in a piece of art would not preclude people from taking that idea, but would protect the particular expression. You are not prohibited from making a baton, even if your inspiration was Leo's baton. However, if you take too much of the particular expression of Leo's baton, that crosses into substantial similarity. Whether you've taken too much is a question for the jury. "There is no special standard of similarity required in the case of 'things'."

Pasillas uses the Krofft test to judge whether two masks are substantially similar. Given that both parties conceded that their works both shared the same idea, the court could skip to "whether the masks' expressions of that idea are substantially similar". But, it incorporated elements of another line of cases that further precluded a finding of infringement when expression necessarily follows from idea.

[w]hen idea and expression coincide, there will be protection against nothing other than identical copying of the work

no substantial similarity may be found under the intrinsic test where analytic dissection demonstrates that all similarities in expression arise from the use of common ideas

elements of expression that necessarily follow from the idea receive no copyright protection

the court concluded that the similarities between the toy dinosaurs — their postures, body designs, and cuddly softness — all derived from the idea of a stuffed toy dinosaur, and accordingly found no substantial similarity of expression

all of these similarities derive from the common idea of a mask depicting the man in the moon. Pasillas simply cannot rely on these standard elements to satisfy the intrinsic test of substantial similarity of expression

When creating a baton, there are certain elements of the expression that are inseparable from or are standard elements of the idea. It needs to be narrow. It is standard to have a handle. The handle is often a different color.

In summary:

  • Just because you saw the baton, and decided to make a baton based on what you saw, that isn't necessarily infringement.
  • If you take too much of the particular expression of Leo's baton, that will be infringement.
  • The answer to that question is case-by-case, and left to the jury. "Obviously, no principle can be stated as to when an imitator has gone beyond copying the idea, and has borrowed its expression. Decisions must therefore inevitably be ad hoc." - Judge Learned Hand
  • Fantastic answer! Very informative for a complicated area, explanatory, and not condescending. The baton in the show was the original idea and my model would have been much larger with buttons and the ability to make sound, which differ from the one in the show. I can see how that could possibly and likely be alright. Thanks a million, again, for being taking your time and being down to Earth with this!
    – Rincewind
    Commented Dec 18, 2016 at 16:49
  • Understood. I figure I am taking the intrinsic qualities of a baton and adding onto it. At this point, I won't be adding anything from the show, I'll just make it play some generic sounds or classical music clips like they do in the show (but not from the show). Outside of that, it may be a stretch to tie them together, I hope.
    – Rincewind
    Commented Dec 19, 2016 at 14:31

Copyright protection has nothing to do with how similar two things are, it has to do with the act of copying without permission. What you propose is copying, and I presume you don't have permission (Disney never gives permission, AFAIK), so it is completely illegal. There is a myth that it's okay to copy without permission as long as you make changes, and that is completely untrue. The issue of "similarity" does arise in alleged cases of non-copying, especially in music, where two tunes can be similar, but the combinatorics of music is such that accidental similarity can arise. The question which a jury would face is whether the similarity could reasonably have arisen by accident, e.g. "has glasses" is something that could appear in a non-copied design. In other words, "similarity" is about evidence of copying, and the law does not excuse copying with extreme transformation.


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