Pebbles are small stones that are usually round or oval-shaped. π€
According to the Udden-Wentworth scale, stones that are 4 to 64 mm wide are called "pebbles." This means they are bigger than sand grains but smaller than big rocks! There are also different types of pebbles, such as river pebbles, which are smoothed out by flowing water, and beach pebbles, shaped by ocean waves. Collecting them can be fun, and each one has a unique story to tell! So, when you're out exploring, keep an eye out for special pebbles you can take home!