I could replace the construction worker with Curious George, and make this a George is on a construction site theme.
Boys racing car cakes (for twins) cake-ideas
ATV/Quad bike cake and Tutorial - by Jo @ CakesDecor.com - cake decorating website
A CAKE THEME CAKE
mcqueen Step-by-step - http://verusca.deviantart.com/gallery/27428187#/d2cb80x
Auto taart Mehr
We did this cake for my Grandson last year with Cars the Movie toy vehicles on it. He loved playing with them latter :-)
2nd Birthday Cake Idea, use car from first pic with 2 on front instead of cloud and number. Use rainbow cake inside.