Pick up a metal heart cookie cutter at your local store and use it to make a heart-shaped breakfast for your sweeties. This works well for pancakes and eggs. You can also use the cookie cutter to cut hearts out of slices of toast. Don't forget to spray the inside of the cookie cutter with a little bit of cooking spray so the food doesn't stick to it.
Another fun food idea is cutting shapes from brownies and putting a dollap of frosting on top. Wilton has combo cutters in two shapes, "minis" and hearts. I used the minis cutter for these Valentine treats for my co-workers. You can find the minis combo cutter here and the hearts combo cutter here at the Wilton website (see photos below). These cutters are so easy to use, and the three...yes, THREE... batches of brownies I made were cut up in a snap!
(Hearts combo cutter and minis combo cutter. Photos courtesy of Wilton. Links to photos are above.)