fun (fən), noun, enjoyment, amusement, or lighthearted pleasure; the children were having fun in the play area; anyone who turns up can join in the fun.

• a source of this; people-watching is great fun.
• playful behavior or good humor; she’s full of fun.
• behavior or an activity that is intended purely for amusement and should not be interpreted as having serious or malicious purposes; it was nothing serious; they just enjoyed having some harmless fun.
• [ attrib. ] (of a place or event) providing entertainment or leisure activities for children;  a 33-acre movie-themed fun park
• Peggle