Learning Resources Sort-Em-Up Pups. These colourful pets are ready for preschool learning. The sets 12 friendly pups come in 4 bright colours and 3 sizes. There are 6 ways to sort them including placing the pups into their fenced-in playpens. Through fun, engaging play, children practise attribute recognition, sorting, and fine motor skills. The pups and the playpens store inside the doghouse when playtime is over. Includes multilingual packaging and Activity Guide. Doghouse measures 11cm H x 13cm W. 28 Piece Set.