Add the desired amount of soap base to a microwave-safe bowl, and microwave until melted (about 30-60 seconds). Add in essential oils (I added 25 drops for 5 bars), stir well, then pour into soap molds. Allow to sit for 5 minutes, then place the small toys in the center of each soap.

If your children are old enough to handle tongs, you can have them help you with placing the toys, which they really enjoy!