Foam Magnetic Tangrams Foam Magnetic Tangrams.(Board not included) Easy-to-grip shapes allow kids to make hundreds of geometric designs in a rainbow of colors. Encourages shape recognition, size comparison, spatial reasoning, pattern replication, and design with these brightly-colored foam magnetic puzzles. Tangram Set includes six 8" tangram squares in red, blue, yellow, green, orange, and purple. Reproducible activity sheet with challenging puzzles makes basic geometry concepts fun. Grades K and up.