Concrete used for playground equipment is typically a special type of high-strength, durable concrete designed specifically for outdoor use. This type of concrete is often reinforced with steel to provide additional strength and stability. It is also formulated to withstand the elements, including exposure to moisture, temperature changes, and heavy use. Additionally, the concrete used for playground equipment is often textured or finished to provide a non-slip surface for safety. **

To embed styrofoam balls in concrete by yourself, you can start by preparing the concrete mix according to the instructions. Then, place the styrofoam balls in the mold or formwork before pouring the concrete. Make sure to evenly distribute the styrofoam balls throughout the concrete mix to ensure they are well embedded. Finally, allow the concrete to cure and set before removing the mold to reveal the finished product with embedded styrofoam balls. **

To embed Styrofoam balls in concrete by themselves, one can first prepare the concrete mix according to the desired project specifications. Then, place the Styrofoam balls in the mold or formwork before pouring the concrete. Make sure to evenly distribute the Styrofoam balls throughout the concrete mix to ensure they are properly embedded. Finally, allow the concrete to cure and set according to the manufacturer's instructions before removing the mold to reveal the finished project with embedded Styrofoam balls. **

To apply concrete on concrete, the existing surface must be clean, free of debris, and properly moistened. A bonding agent or primer should be applied to the existing concrete to ensure adhesion. The fresh concrete mix can then be poured or pumped onto the existing surface and spread evenly using a screed or trowel. It is important to properly cure the new concrete to prevent cracking and ensure a strong bond between the two layers. **

Yes, it is possible to pour new concrete over old concrete as long as the existing concrete is in good condition and properly prepared. The old concrete should be clean, free of any loose debris, and roughened to provide a good bonding surface for the new concrete. Additionally, a bonding agent may be used to ensure a strong bond between the old and new concrete. It is important to consult with a professional to assess the condition of the existing concrete and determine the best approach for pouring new concrete over it. **

For setting lawn edging stones, garden concrete would be the better option. Garden concrete is specifically designed for outdoor use and is more durable and weather-resistant than concrete screed. It also has better adhesion properties, making it more suitable for securing the edging stones in place. Additionally, garden concrete is often formulated to be more resistant to cracking and shifting, which is important for maintaining the integrity of the lawn edging. **

Football shoes with rubber or turf outsoles are suitable for playing on a concrete pitch. These outsoles provide the necessary traction and stability on the hard surface of a concrete pitch. Additionally, shoes with cushioning and support are important to protect the feet from the impact of playing on concrete. Look for football shoes specifically designed for turf or hard ground surfaces for the best performance and comfort on a concrete pitch. **

It is unclear whether the concrete ring was poured with the wrong concrete based on the information provided. The concrete ring may have been poured with the wrong concrete mix if it did not meet the required specifications or if it resulted in structural issues. Further investigation or clarification from the relevant parties would be needed to determine if the wrong concrete was used for the project. **