It's bound to amaze your kids. The outer layer is made of hard acrylic material and the inner one is made of friendly high borosilicate glass，which is protected by double layer.
30 Minute Sand Timer, Plastic Sand Clock, Acrylic Hourglass Sand Watch 30 Min...
Hourglass 30 Minute Sand Timer, Wooden Black Half Hour Glass with Sand, Large...
Hourglass 30 Minute Sand Timer, Vintage Brass White Sand Clock, Metal SandWatch
30 PCS 1 Minute Sand Timer, Plastic Colorful Hourglass Timer, Visual Sand Clo...
50 Pcs 2 Minute Sand Timer for Kids, 2 Minute Sand Timer, Mini Hourglass Bulk...
One Minute Sand Timer, 6Pcs Blue Mini Glass Hourglass Timer 1 Minute Sand Clock
