Just to clarify a little bit, Aging Crystals only work if a lion is in adolescence (1 year to 1 year, 10 months old). You can't use them on cubs who are under 1 year and would either need to wait for the cub to age up to 1 year or use an Aging Stone on them.
Aging Stones can be used on cubs right when they're born to age them up to adolescence (1 year) instantly.

Aging Crystal (used on adols) can be bought from the Monkey Business
Aging Stones (used on cubs) can be bought from the Oasis

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You can use Aging Crystal (500 SB) to make an adol reach 1 yr 11 months
You can also use aging stone (2 GB) to make cub reach to 1 yr.

But aging stone has to be used first then Aging Crystal if you want your lion to be 1 yr 11 months

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oh yeah Paradox is also correct, i forgot to add that the "working part" in XD

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