Why Should I Join? KidStart is the easy way to top up your baby’s savings by earning money back on your shopping – from baby essentials, household bills, groceries to fashion. Save with over 2,300 retailers including John Lewis, Sainsbury’s, eBay, Mamas & Papas, TUI, H&M and more. Start before setting up a savings account for your baby or whilst pregnant and invite family to help too. To say thank you KidStart are giving Bounty mums £5 when you make your first purchase.