An aquarium where every creature was drawn by someone. Colour one on paper or on a phone, and it joins the others in the water.
One of 12 sea creatures, on a printed sheet or straight on a phone.
Snap the sheet or tap “Swim!”. The tank finds your creature, cuts it out and turns it the right way up.
Each species moves its own way: jellyfish pulse, sharks cruise and strike, the octopus ripples its arms.