Joshua's latest milestone

Joshua can now ride a trike by pedaling!  Thus far, he has gone very fast "flintstone" style, and I have been trying to get him to pedal, but to no avail.  We went to a play center this morning where there were trikes, and he did pretty well; I attributed it to the different design of the trike and the fact that he was riding on a smooth surface.  But when we got home, he hopped on his trike and just took off!