Not all reefs in the past were formed by corals: those in the Early Cambrian (542â513 Ma) resulted from calcareous algae and archaeocyathids (small animals with conical shape, probably related to sponges) and in the Late Cretaceous (100â66 Ma), when there also existed reefs formed by a group of bivalves called rudists; one of the valves formed the main conical structure and the other, much smaller valve acted as a cap.
You can engage your child on the floor once your little one can support his or her head with the Bumbo Floor Seat in the Blue style. The seat enables your child to sustain a sitting position on the floor, so you can read to, feed and play with him or her safely. Low-density foam in the contoured seat is comfortable for your little one, and a three-point harness keeps him or her safe. You will love the lightweight, easy-to-clean design.
Booster seats are for older children who have outgrown their forward-facing seats. All children whose weight or height exceeds the forward-facing limit for their car seat should use a belt-positioning booster seat until the vehicle seat belt fits properly, typically when they have reached 4 feet 9 inches in height and are 8 through 12 years of age.