Connetix - Bright Portal Pack 48 pc

The portal squares snap together firmly but still come apart easily for my 4-year-old, and I love that the open-frame design lets light shine through for a cool effect.

My 6-year-old spent an entire afternoon connecting the different sized squares together to build a little castle. The open-frame design on the portal pieces makes them so much more versatile than regular magnetic tiles. Really glad we went with this set.

The magnetic points on the inner edges of the open-frame squares let me build 3D structures that actually hold together. My kids spent the whole afternoon connecting the three sizes of nested tiles into a little castle. The bright colors really pop when light shines through them.