FREE Printable Bubble Letters Freebie Finding MomBalloon letters in lowercase can be used to include a playful and creative touch to graphics. Bubble letters in lowercase have a attractive and relaxed look. They can bring about a feeling of youthfulness and imagination to various tasks like invitations, signs, as well as logos. If you want to convey a energetic and joyful note, employing bubble alphabets in small letters may be a fantastic choice.