Costco offers its members the Munki Munki Kids' 2-piece Pajama Set in Space or Pizza for $6.97 with free shipping. (Non-members pay 35 cents more.) That's the lowest price we could find by $10. They're available in sizes 3 and 12.
Planning for retirement savings to last until you are 90 or older is a daunting job. Make these errors, and the task goes from "difficult" to "impossible."