The four have just the right size to fit into the hands (and mouth ;-)) to our 8 month old daughter. Thanks to the colors they fall her always immediately apparent as soon as we only entered the bathroom and there is a hilarious squeak. During bathing, it is great fun for them when we left to soak the animals and then against splash or produce small fountains so the water her. To do this yourself, it is not yet strong enough, but it will come come ;-)
The animals are made of soft material and can be pressed easily in order to suck full of water. Are cute to look at - and important date, also sparked no color - despite continuous stress :-)