Charlie has shown some passing interest in the Thomas trains, pushing them around a little but not real interested in the tracks or accessories. This afternoon as we were playing, he started making train noises (ch-ch-woo-woo) with cars. So I got out a handful of tracks and Charlie immediately put Thomas on the tracks and "ch-ch"ing. So then I produced the clincher - the Sodor bay bridges. Charlie loved pushing the trains across the bridge and saying "whee!" as they slid down the ramp on the other side. Sure hope Charlie & Thomas become better friends!