You do not need a PayPal account to purchase a Car Seat Poncho. PayPal is merely the processor of the credit card transaction, and does not require an account.
But PayPal does not make it easy to find that option on their payment page! We've highlighted them on these screen shots to make them more obvious (IE and Mozilla versions): Please feel free to call us at 917-881-9044 (10 a.m. to 9 p.m. Eastern Time) if you have any other questions.