Isaac turning Liam's Lego Duplo pyramid into a Mobile Robo… | Flickr
16 Amazing LEGO DUPLO Build Ideas | brick | With just a handful of bricks, you and your toddler could make all of these together ☺️ | By LEGO DUPLO | Facebook
Brickshelf Gallery - a30-duplo-pyramid.jpg
Duplo numbers forming a pyramid with number 1 at the top. The image is set against a white background Stock Photo - Alamy