Image is available as a digital stamp @ Art by Barb
Spectrum Noir colour pencils.
Faber Castrell colour pencils.
Copics for the hair.
A promarker for the sun.
Whilte gel pen to add highlights.
I haven't compiled a list of colour combinations because I like to encourage you to experiment with what you already have and not get too hung up on having the exact colour match and run out to buy them. Being there and done that! If you have a different brand, it's ok to use them. I think most people can guess the colours I have used from the picture, blues for the water, greens for the greenery and so on. I pick out any green that comes to hand first, and it doesn't matter which shade with pencils as we are going to do a final blend and will merge together all the colours.
Tip: Pencils are less likely to break if you change hands and turn the sharpener and not the pencil. It works!