Yellow Door Interlocking Sensory Stones

Ideal for exploring matching and symmetry, these pairs of interlocking stones are designed so that each pair interlocks in a different way, from concentric circles that can be continually twisted to shapes that can be interlocked in two, three, or four positions. There's plenty of options for play with these stones, even creating a memory game. Starting with them laid flat, can you find all the matching sets? The set contains eight stones measuring 75mm each.