Procter & Gamble is pairing up with Babies R Us and Toys R Us to offer up to $75 worth of free gift cards from the stores when you buy P&G products there.

I received an e-mail from P&G Everyday about the offer, which expires Sunday.

The promo says that if you buy any two Pampers value boxes of diapers, 88-count or higher, you’ll get a $20 gift card.

Take your total to $50 in gift cards by buying one 150-ounce Dreft laundry detergent, one 12-count Bounty giant white paper towels and one 3-count Charmin Ultra Soft toilet paper. You’ll get a $10 gift card for each of those purchases.

Finally, reach $75 by purchasing one 100-ounce or higher Tide laundry detergent, one 72- to 96-count Pampers Extra Protection diapers, one 40- to 60-count Pampers Easy-Ups training pants, one 448-count or higher Pampers value box of wipes and one 24-count Duracell AA battery pack. Each of those purchases will get you a $5 gift card.

You don’t have to buy any of the items beyond the initial diaper purchase unless you want the full $75 in gift cards. The promotional gift cards expire May 2, the e-mail said. Only in-store purchases count.

To see the e-mail offer, go to http://www.pgeveryday.com/email/toysrus/2628/web.html