Cowboy's Antics

Naturally Collin (6) is in Bastrop with his Mimi and Papaw. He spends every possible moment there. We live 4 hours from his grandparents so as soon as school is out, he is gone. I miss the little fart though. His interests are trucks, tractors and motorcycles. How can one person focus on vehicles so much? Kindergarten was a challenge because it interrupted his time with his trucks.