No matter what materials you choose, it is most important that you supervise your child constantly so that mistakes get caught rather than practiced. I learned this particular lesson the hard way. When my daughter was young, she did something that needed "attention." I no longer remember what it was that she did, but I told her to write the sentence "I will not disobey my parents again" 50 times. I should have known better, but I didn't check on her at the beginning and then I got busy. So, sometime later, she brought me 50 sentences of "I will not disobey my parents agen." She had just practiced misspelling "again" as "agen" __ 50 times! I'm not certain that we ever really got that fixed. This issue of NOT practicing mistakes is extremely important. Parents shouldn't give worksheets as busy work and teachers should only use them if you are going to have a non_math teacher substitute. White boards with supervision are always a better way to practice skills. If you need some time to do chores, your child will get much more benefit by helping you with the chores. And maybe you can work in a little discussion of numbers or counting while you do chores together.
The heart shape is fantastically useful for teaching all sorts of mathematical problems, including geometry. Have your child cut out a heart shape from paper and use it to help them understand symmetry. How many lines of symmetry does a Heart Have? Help kids learn about patterns by using colored hearts or a series of Valentine's Day pictures. Introduce them to simple patterns; for instance red heart, green heart, red heart. From here you can make the patterns more complex by making them longer or including a higher degree of variation. Valentine's Day is a perfect opportunity for educating your child about many math problems; from simple arithmetic and word problems to patterning and geometry. There are many ideas to choose from that you're sure to find engaging and rewarding for both you and your child. So give them a try next Valentine's Day and see if your child will be struck by Cupid's arrow and feel the love for math.