HELLO BUBBLES

I meant to ask Mr. Poo ( before he went away) how you keep these darn camera's in focus when taking these pictures - I cant just get the hang of it as I was taking pictures of these two kids making bubbles in the supermarket car-park - I suppose its like anything else - more picture make perfect!  I thought this one was a bit like my friend the Rabbit being pulled out of a hat - how many different Cosmos there are ?  I had another one you might like better ( in Extra's)
rgds Querky Cosmos