Usher Beach and Usher Park are more of a local spot than a tourist attraction. The park is very nicely shaded and has typical park stuff: slides, swings, other normal stuff. The beach is small and great for little kids. There is a lifeguard, but you can use floaties for your children (or at least we were able to and I did not see a sign against it.) My son had on a floaty and another child had a life vest on with no issue from the lifeguard. Most beaches near me do not allow anything that will aid in swimming.
Usher Beach also had their own supply of sand toys for children to use while there. Shovels, little boats, and castle-making equipment was there. The water had 2 areas roped off, side-by-side. One for very little children that was probably 8 feet wide and went out to about 2 feet deep. The larger area was about 12-15 feet across and went out to about 4 feet deep.
The only issue with the beach is the boats that go by on the lake. There's nothing to be done about them, but the waves created can be a little overwhelming for a smaller child.
On a scale of 1-5, I give Usher Park and Beach a 4.5. The water and sand were both very clean, and the kids had a great time.