When people reflect back on their life and their relationship with their children they wish they would've spent more time with them. You will be hard pressed to find somebody wishing he spent more money on them, especially if the outcome of raising them was not as desired.
Sharing some interactive and fun activities with your kid will foster bonding between you two, contribute to the healthy development of the child, and allow you to have a bigger opportunity to have a positive influence on your child's life.
Spend quality time with your kids, it's a great investment!