Busy Baby's headline offer is 15% off your order, which gives a percentage discount on anything you buy. If you're shopping for multiple items or have specific products in mind, though, several category and bundle deals may save you more money depending on what's in your cart.
For smaller baskets under $70, the 15% off deal is your best bet unless you're buying bibs or the pink and blue mats. If you're stocking up on bibs, go for the 25% off all bibs offer instead—that will beat the 15% discount. Similarly, if you're after the pink and blue mats, the 25% off those specific products will save you more than the general 15% discount.
If you're buying bundles, the 20% off bundles deal should be your first choice, as it beats the standard 15% off order. If you're planning to buy two bundles together, the buy 1 bundle and get $20 off a second bundle offer might work out even better depending on your bundle prices; compare both at checkout to see which gives the larger saving.
For orders over $70, free shipping kicks in automatically, which is a nice bonus on top of your other savings. If your order hits $100 or more, you'll also qualify for free gifts, adding more value to your purchase.
For orders over $70 combining multiple product types, look at whether the 15% off your order, the 20% off bundles (if bundles are involved), or the category specific deals give you the best result. If you're mixing bibs with other items, for example, the 25% off all bibs will only apply to the bibs themselves, so the 15% off your entire order might actually save more overall.
Remember that only one offer applies at checkout, so compare the savings each option would give you with the items in your basket and choose whichever produces the largest discount.