I came across Fetal Doppler machines on the web and I'm tossing around the idea of renting or buying one. There is no real need for a fetal Doppler, but they give you the ability to hear your child's heartbeat whenever you choose which I find rather cool. They're expensive to buy, but might be worth it if we have more than one kid and my wife wouldn't kill me for shelling out a few c-notes on one of these.

Stork Radio rents units of varying complexity from $20 to $50 per month and cost from $279 to $599 for purchase. You won't be able to hear the baby's heart until the 2-3 month range, so plan on a 6-7 month rental putting you between $120 and $350 to rent depending on the model and length of time.

It's one of those nice-to-haves that my wife would initially yell at me for buying an expensive geek toy, but would later love.