Don’t let anyone tell you that you have to wait to teach your children Geometry. They can learn Geometry, even if they don’t know their multiplication tables.
Teach your very young children relationships in various levels of Math. For instance: 1/2 of a Dollar is 50 cents. 1/2 of a circle is 180. They both mean 1/2. The only difference is the vocabulary terms. Tell them 1/2 means divded by 2.
1/4 of a Dollar is 25 cents. 1/4 of a circle is 90 degrees. 1/4 means divided by 4. The only difference in the two is the vocabulary terms.
Never limit your children’s learning based on theories.