Water Gun 
To spray someone with a water gun in a dream represents your need to express your emotions toward that person. Your true feelings might be misinterpreted as your anger or love is simply creating an annoyance in the other person.
Boathouse
To see a boathouse in your dream indicates a feeling of confinement and staleness in waking life. Just as a boat sitting idle and unmoving in a boathouse, you feel in waking life that you are being stuck, not progressing nor growing.
Dreaming that you are preparing to take a boat out of the boathouse prominently implies that you are soon to be free with more choices in waking life, especially if you untie a boat and set it out into the open water in your dream.
Backstroke
To dream that you are doing the backstroke signals that while you recognize your feelings, you are not confronting them.
Snorkeling
To dream that you are snorkeling indicates that you are searching for understanding regarding certain feelings that you harbor. It also implies that you want to take lessons from your past and change your perceptions in order to avoid making similar mistakes.
Inner Tube
A dream about floating in an inner tube indicates that you feel you are on a path controlled by your emotions.
To dream of going with the flow in an inner tube indicates that you are comfortable following your emotions.
Life Saver
A life saver in a dream refers to safety and comfort in your life.
To dream of colorful candy life savers represents happiness and security.
To dream of floating in a life saver indicates that you feel as though you have been rescued.
Water Park
A water park in a dream represents emotional intensity. For many, a trip to a water park represents great joy and a connection to childhood.
Alternatively, the rapid and twisted flow of water may symbolize inner turmoil and confusion.
Beach Ball
A beach ball in your dream is an indication that you're lacking fun and excitement in your waking life. A beach ball generally signifies the sun and water at the beach or the pool which as a whole represents your desire to let go and take some time off to enjoy your life more.
A beach ball may also be a sign that you're lacking interaction with people on the topic that gives you joy and pleasure.
Bodysurfing
Dreaming of bodysurfing is a strong symbol of going with the flow. It represents letting the waves take you where they may and letting the chips fall where they may. Dreaming of bodysurfing is your subconscious mind indicating that you shouldn't try to alter or interfere but rather just let things go or happen naturally.
Hippopotamus
A hippopotamus is a quiet creature with hidden strengths. Similarly, human beings have untapped potential, talents, and powers.
To dream of a hippopotamus pertains to revealing your strength and power.