New and old carts

I have titan knees and don't want to carry big weights.
I have to invent sometimes a little.
I have use my baby strollers for years, but Jarmo bought me yesterday new carts. I try to use to them (but use my old carts surely for a long time still...)
My baby strollers are quite old (23 years, bought for my daughter..) and little broken already.
I am happy because of my new carts.