ROKR Magic Piano 3D Wooden Puzzle Music Box, 223 Pieces, 1:20 Scale
A 1:20 scale wooden grand piano you build yourself from 223 pieces, then wind up so its keys play "Variations on the Canon" on their own, no batteries needed.

The Astronomer is a UGEARS 3D wooden puzzle that builds into a fully working table clock. It includes 338 wooden parts and instructions, and the pieces fit together without glue or special tools, per the listing. Its centerpiece is a tourbillon, a rotating escapement mechanism shown in motion on the front of the clock. It's listed for adult builders.
It's a long, satisfying build that ends as a clock you can watch tick, with the tourbillon turning in plain sight. A good gift for anyone who likes mechanisms more than screens.
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