A children’s debit card is a great idea! It teaches proper budgeting, spending, and investing, is by developing good habits at a young age.
What you don’t like is shopping for big clothes. Outfits for the big guy – whether you’re big in height, girth or both – are difficult to find in many men’s clothing stores. The big and tall shops have them, but being a big guy doesn’t necessarily mean you’re a big ‘fashion’ guy, and the sales clerks aren’t always much help beyond pointing you to the fitting room and taking your credit card.