Kegel balls are inserted - and by holding them in and clenching around them, you'll target and strengthen the correct muscle groups.

But, as well as giving your internal muscles a good old work out, they also feel realllllly good. Besides the strengthening benefits, not to say that using love balls isn't a fun way to get in your Kegels, although  sharing a sexy secret with your partner (or simply knowing you're holding something in your vagina) can be super-hot!
And now what better way to spice things up when you are not in the same room, or town or even country

They're also known to increase sexual sensitivity and intensify orgasms.

To be used as solo play or with a partner to spice things up in the bedroom.

Please note: Pictures 2,3,4 and 5 only for reference
Colour shown on First Picture