I believe coupon policy is one mfg coupon per item. So you could you 4 coupons on 4 different toys that are $5.99 or more. Target allows one mfg and one store coupon per item as long as the coupons are less or equal to the item price.
FYI if they are internet printed coupons, a lot of stores are only allowing 2 internet coupons per transaction b/c you technically can only print 2 per computer.
HTHS