I do believe they make a chewable prenatals but you would have to ask your doctor where you can find them as not all stores carry them. Some doctors recommend taking chewable childrens vitamins which you can get at any pharmacy.
My midwife said to get everything you need in a prenatal, look for a food-based prenatal. They sell them in children's chewables as well. Check your local healthfood store for them.
Not sure where you are located but if you have a Target store around you they sell chewable prenatal vitamins. They taste good, just like fruit snacks.
Any drug store or shop should have them, but I believe they only sell them in the states. If you're located in another part of the world it might be more difficult to find. Judging that you called them tablets, I assume you live in the UK or possibly Canada. (Please correct me if I'm wrong though) You can call a pharmacist or your doctor and they should be able to give you a few recommendations.
Where can you get them from please?
2 Flintstones vitamins a day.