A Happy Birthday Boy

Today was Mckenzie's 2nd birthday. We took him to Roves Farm, where he had lots of fun with his Cousin.
It was actually too wet to go around the farm but a huge barn has been turned into a play area for the children, filled with tractors, sand pit, rabbit warren, wavy slide, painting, bouncy castle, ball pit, ropes and nets. Oh....and a cafe. What more could a hungry 2 year old ask for?
He absolutely loved it and to see the pure joy on his little face was wonderful.
I'm now exhausted, after running around with him for 3 hours! Where do they get their energy from?