Hi Stanislava
We have sensors that can measure in 3 axes, accelerometers, pressure, with all these sensors you can integrate them into an object and monitor its position and maybe with good software logic with the accelerometer predict its position in the future.
With the pressure sensor you can identify your altitude, you have many possibilities you just need to be creative, good luck.
Unfortunately I think it's not a good idea to talk about other people's projects, but good luck.
Have a great day and best of luck.