My wife informed me that she needed a new tray for our sons math blocks, so, I made one.
I borrowed the design of the inlays from yeaughourdt @ https://www.thingiverse.com/thing:4586102 and I user the numbers from MakerBot @ https://www.thingiverse.com/thing:299774/files. The rest I used basic blocks and tools in 3D builder.
I tested the print and it fits in the original Math You See box perfectly. It is a little deeper than the original to fit the blocks better, but still fits as you can see from the pictures.

Enjoy!

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