Abstract: A play table and activity center for use with a modular building system having a multitude of interlocking elements has a generally planar play surface which includes a plurality of recesses sized and shaped to matingly receive the interlocking elements of the modular building system. Preferably, the recesses are provided by individual segments which are assembled to collectively define the play surface, the individual segments being removable for use at a remote location and to facilitate the cleaning of the play table. An opening in the play surface provides access to a removable storage compartment for retaining the interlocking elements of the building system. Optionally, the play table may be converted into a substantially conventional table by assembling a flat panel above the play surface.