The Construction Site toys have to be fun, of high quality, and made up of pieces that can be assembled and reassembled in different ways. A model airplane would not qualify, since there is only one way to put it together, and once it is glued together, it can't be disassembled and built again. The store's concept appears to be unique, according to the owners and their suppliers. Even the Lego Group was taken aback by the store's initial order. Three months after opening, The Construction Site placed in Lego's 300 top-selling independent stores.
Visitors can try out display sets at child-sized play tables.
It also carries large sets designed for group play, which have been purchased by local day care centers and the Waltham public schools. Although many of the toys specify a suggested age range, The Construction Site philosophy is that one can never be too old to play with any of these toys. This may be especially true for engineers. Delfino enjoys Geoshapes, a connecting set that relates to his Major Qualifying Project on graph theory. He sent a similar toy to a WPI friend who wrote that it rekindled his passion for tensegrity structures and inspired a desire to build a geodesic dome.