Mary, a.k.a. Ladybirds, contains a wooden tray with three sets of ten squared tiles with different patterns:
10 ladybugs, with each ladybug bearing a number of dots from 1 to 10
10 puddles of paint, each of a different color
10 pictures of different colors with simple shapes (umbrella, kite, worm...)
The player needs to arrange these tiles in the tray with respect to colors and/or numbers.