1. Austor Baby Safety Self-Closing Electrical Outlet Covers Wall Socket Plugs Plate Alternate for Child Proofing, 6 Pack (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
Austor Outlet Covers are designed to eliminating potential electric hazards to children, super convenient with immediate self sliding panels that closes itself once a power cord is removed and making it practically impossible for children to access themselvesBPA free, Durable and High quality plastic made

2. Uclever Outlet Plug Covers Baby Proofing Electric Protector Caps Kit for Child Safety ( 24 Plugs + 4 Keys) (Click Link to Check Price on Amazon)
Editor's Rating : 9.9 out of 10
Three Prong Plug - Cover 3 prong outlets plug, fit standard 3 pronged wall outlets & power strips, smooth & non-grip surface keep the baby from pulling out and prevent accidental electric shock.Made of ABS - enhance durability. Besides protecting children, these are useful for covering up outlets to secure your cute pets, minimize air leaks and prevent fires.

3. Mommy's Helper Outlet Plugs, 36 Count (Click Link to Check Price on Amazon)
Editor's Rating : 8.8 out of 10
Individual Outlet CapsPrevents accidental shock

4. Munchkin 36 Count Plug Covers (Click Link to Check Price on Amazon)
Editor's Rating : 8.9 out of 10
Protects young children from potential electric hazardsSmooth, non-grip design helps prevent young children from tampering with plug when installed

5. Safety 1st Plug Protectors, 36 Count (Click Link to Check Price on Amazon)
Editor's Rating : 9.1 out of 10
Tested for safety and durabilityMade using high quality materials