A good way to prevent this is by storing your Toy-Con parts together. For example, you could keep the smaller parts in any bag you happen to have handy.

The waveform and rhythm cards used with the Toy-Con Piano are easy to store by wrapping some string (not included) around them. Try placing the little bits that come out of the rhythm cards in a box to make them easier to keep track of.

Smaller parts such as knobs for the Toy-Con Piano or tools for the Toy-Con Robot can be stored inside the main Toy-Con they are used with.

Just to be safe, we recommend holding on to the cardboard sheets, even after the pieces have been removed from them. Then you can use the empty spaces left by the removed parts as stencils to trace for replacement parts.