Young family with two kids

We are young family growing up 2 kids, 2 boys David 4,5 and Mark 1,5.

They both are well and healthy, i just want a bit better childhood for them. We live in a small one bedroom flat, im not asking money for new one, it would be too much to ask, we will try to make it ourselves, and maybe in time we will get it ( new 2 or 3 bedroom flat costs about 80-100 thousands € ).

All i want now, is not to worry or stress if my kids needs some new clothes or wants new toys, but to have that little reserve just for them, for their little dreams and needs..