Letter X – Xylophone Coloring Page A toy xylophone with two crossed mallets sits beneath a big bubble X. The bars step down in size, which makes them perfect for coloring in rainbow order. Kids can say each color aloud as they work, turning the page into a color-order lesson too. Color online Download PDF Print Ages3–5 DifficultyEasy FormatPDF · US Letter (fits A4) PriceFree for home & class