I bought these specifically for a cross-country flight with our 5-year-old, and they were an absolute lifesaver. The metal tin they come in is the best part?Xit's sturdy, compact enough to easily fit in a backpack, and doubles as a small building surface on the tray table.The magnets are strong enough that the blocks don't go flying with a little turbulence, but they're still easy for little hands to pull apart and build with. Sixty pieces was the perfect amount to keep her engaged in building little robots and houses without being overwhelming to clean up. Because of their small size, this is now our designated "estaurant and travel" toy. It's a fantastic, screen-free way to keep a kid occupied on the go.f