How to make a Pebbles costume?

How do I make a Pebbles Costume for halloween....I am a teenager and my boyfriend is going as Bam Bam...It would be helpful if you could give advice to make his costume as well.

She always had a ponytail on top of her head with a bone in it instead of a ribbon.
Her dress was always off one shoulder and leopard print.
Her hair was also red like her mom Wilma.

Bam Bam Rubble Teen costume

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Bamm Bam Costume Flintstones Flinstone Adult Mens XL Dlx Caveman w Feet US $56.00

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Child's Flintstone Bam Bam Costume (Size:Small 4-6) Sale Price: $29.67   Eligible for free shipping! Availability: Usually ships in 1-2 business days

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Bam Bam Movie Costume Theatre Costumes The Flintstones Cartoon Character List Price: $97.99