Checkout this awesome 3D Printable Mini Table Fountain. This can be printed in 1 go without any support required.
The water falling makes an awesome relaxing sound which is good for mind :)
All you need is a mini submersible pump + AA batteries or 2.4volts to power this.
checkout this YouTube Video for installation process.
3D Printing Details:
Layer height 0.2mm (not more than this)
Wall perimeter 4 or 5 (for less chance of water leaks)
Infill 30 %Print speed 60 m/s
Printed in PLA at 205 Degree C nozzle and 60 bed.