Becky claims to have been afraid to jump off the high dive at the pool, when in the family's trip to Hawaii she dove off the edge of a waterfall (which would clearly be higher than a high diving board.)
Obvious stunt double in the shot of Edna bungee jumping off the bridge. Also, when she yells "Cowabunga!" her mouth doesn't open.
Concerts that feature bands like Counting Crows generally do not allow small children as it is easy for them to get lost in the venue or trampled in the mosh pit. Danny should have let DJ and Stephanie go like they planned.
The bridge, which Rebecca and Jesse bungee jump is supposed to take place somewhere in the San Francisco Bay Area. In some of the shots, the 134 freeway in Southern California is shown making it obvious that they're on the Colorado Street Bridge in Pasadena, which is where the bridge scenes were filmed. The Bay Area doesn't have any such high bridges with roads that are parallel to a freeway around the same height.