エコクレヨンメーカー | KiwiCo

My six-year-old was obsessed with watching the crayon pieces melt in the sun-powered maker, and the mold worked perfectly every time to pop out a solid rainbow crayon. It's a simple setup that kept her busy for a whole afternoon, and I love that it uses up all our broken bits.

My kids were skeptical at first, but watching the crayon pieces slowly melt under the sun and reform into those custom rainbow shapes actually felt like a little science experiment. The whole thing is simple enough for them to set up on their own, and I love that it uses only what we already had lyi

The solar-powered melting is genuinely clever—we left it on the windowsill for an hour and watched the broken bits fuse into a swirl. Great way to use up all those stubby crayon ends.