Themed kits for use in kids tuff trays, pretend play. I believe all play should be accessible to all, so my kits are not designed for use in huge expensive trays. All my kits are reasonably priced, designed and shown in a simple washing up bowl. I use this for my own children, sensory play does not need to be big or expensive. And if you have more room, simply buy or make more sand/dough etc to add in.