Simplify the following text for a Grade 3 native English-speaking person.
Original: Both neon gas and liquid neon are relatively expensive â `` for small quantities , the price of liquid neon can be more than 55 times that of liquid helium . The driver for neon 's expense is the rarity of neon , which unlike helium , can only be obtained from air .
Simplified: There is not much neon in the air , and it is clear , so we do not see it .