In 2005, LEGO introuducted the first sets in their Duplo "Thomas" series. Five sets were made, featuring James and Thomas (in 2 sets), Toby and Percy. Each year sience, in line with usual Lego pratice, new sets have been released featuring different scenes and characters. The range ran untill 2010, when it was discountinued because HiT Entertaiment signed a deal with Mega Bloks to make counstruction sets based with Thomas. Duplo is designed for young children, so the sets have relatively few pieces to assemble.