TATE Modern in London operates completely on the support of its visitors (over 8 million per year), trusts, foundations, and corporations. Therefore, it is important for the TATE to generate enough interest in people to make donations and keep the functions of the museum going.
The donation box has been designed in such a way that when donors drop coin into the box, it doesn't reach the bottom immediately. Rather it stumbles down from one obstacle to another placed on its way down the bottom. People (especially kids) make multiple attempts to make sure that it takes long for the coin to finally settle at the bottom of the box. This experience is quite opposite to the one that we get while playing Tilt Maze Game where the objective is to bring the metal ball in the center of the maze as quickly as possible.