Mr. McGroovy's Box Rivets make it easy for kids to build large and small cardboard creations. Just punch a hole in the 2 pieces of cardboard you want to connect, place rivets into the hole and snap them together. Create houses, forts, ships, sets for plays, front yard displays for the holidays. Grea...

Mr. McGroovy's Box RivetsTM are inexpensive, reusable plastic connectors that make building fantastic cardboard creations quick & simple. The Double-Wall Kit contains 200 rivets to connect up to a 3/8" thickness of cardboard.

Mr. McGroovy's Box Rivets are inexpensive, reusable plastic connectors that make building fantastic cardboard creations quick & simple. The Single-Wall Kit contains 200 rivets to connect 3/8" thickness of cardboard.