We have ten of these, but I don't know from which series! When pressing the yellow button it makes a sound that could be a train or a tractor or something like that. We are curious. Does anyone know?
This is a Duplo Sound Effects Brick 2 x 4 with Water and Pump Sounds (Set 5605) brick from 2008. It featured only in 1 set, 5605 Tanker Truck.